As this is failing on ADT, it is failing on VMs on an environment we don't have much control of. This could be caused by host kernel, qemu or libvirt combinations that will make the guest kernel observe a given mitigation while it's not really in place.
This test was added after 5.4, so the failure won't be observed on kernels before 5.11. I have fixed it once so it detects the Vulnerable case and have the test return the SKIP code. We need to fix this sooner rather than later, otherwise ADT test results will continue to fail. The other option is to skip this on our tests. Cascardo. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1953366 Title: spectre_v2 from ubuntu_kernel_selftests ADT test failure with 5.13/5.11 ppc64el Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Incomplete Bug description: This is a scripted bug report about ADT failures while running linux tests for linux/5.13.0-23.23 on impish. Whether this is caused by the dep8 tests of the tested source or the kernel has yet to be determined. This test was previously being skipped. After recent test changes, it's now showing up as a failure. Not a regression. ubuntu_kernel_selftests.powerpc/security:spectre_v2 consistently failing on 5.13 and 5.11 Found failing on: Impish/linux 5.13.0-23.23 Hirsute/linux 5.11.0-42.46 (passed on first run, though failing after retrigger) Foal/hwe-5.13 5.13.0-23.23~20.04.1 Focal/hwe-5.11 5.11.0-42.46~20.04.1 23:45:31 DEBUG| [stdout] # selftests: powerpc/security: spectre_v2 23:45:31 DEBUG| [stdout] # test: spectre_v2 23:45:31 DEBUG| [stdout] # tags: git_version:d9c024c2-dirty 23:45:50 DEBUG| [stdout] # sysfs reports: 'Mitigation: Software count cache flush, Software link stack flush' 23:45:50 DEBUG| [stdout] # PM_BR_PRED_CCACHE: result 2147483649 running/enabled 19680067308 23:45:50 DEBUG| [stdout] # PM_BR_MPRED_CCACHE: result 2147475077 running/enabled 19680064034 23:45:50 DEBUG| [stdout] # PM_BR_PRED_PCACHE: result 0 running/enabled 19680062840 23:45:50 DEBUG| [stdout] # PM_BR_MPRED_PCACHE: result 0 running/enabled 19680061722 23:45:50 DEBUG| [stdout] # Miss percent 99 % 23:45:50 DEBUG| [stdout] # Branch misses > 15% unexpected in this configuration! 23:45:50 DEBUG| [stdout] # Possible mis-match between reported & actual mitigation 23:45:50 DEBUG| [stdout] # failure: spectre_v2 23:45:50 DEBUG| [stdout] not ok 1 selftests: powerpc/security: spectre_v2 # exit=1 23:45:50 DEBUG| [stdout] make: Leaving directory '/tmp/autopkgtest.XkeXuO/build.i7C/src/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/powerpc/security' Testing failed on: ppc64el: https://autopkgtest.ubuntu.com/results/autopkgtest-impish/impish/ppc64el/l/linux/20211204_000820_141a2@/log.gz To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1953366/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
